Masato MAEDA's research while affiliated with Kobe University and other places

... Dynamics motion analysis of human behavior has been an active field of research and application in the past few years [1]. Simulating accurately human behavior has become an important asset in ergonomics, crash dynamics, sports, rehabilitation and even in the field human machine interface. ...

... Measured and predicted output force during MVC with intervals of rest before modifying the FT fiber parameter that affects the muscle recovery (Case R1 -MVC: 30 s, rest: 10 s) (c) Cases R3 -MVC: 40 s, rest: 20 s Fig. 19 Measured and predicted output forces during MVC with intervals of rest using the modified parameter describing the rate of recovery of FT fibers Nishida et al. (2016) previously proposed a method of predicting the endurance time and the variation of the output force during MVC with intervals of rest by expanding the muscle fatigue model proposed by Liu et al. (2002). However, their model did not show good prediction accuracy under a low output force because it did not consider the roles of ST and FT fibers. ...

... Thus, it is necessary for the evaluation of lifting operation to consider the physical property of worker, especially muscular strength characteristic. Nishida et al.[12]suggested the method to evaluate the quality of various lifting operation patterns simulated with movement simulation considering the muscular strength characteristic of worker. They also suggested the method to determine lifting operation pattern to make the workload of worker decreased by movement simulation. ...

... For that reason, when building programming for sprint mastery, it is logical to begin with a proper starting position, which the crouch start provides. A crouch start elicits similar kinematics to block clearance, including similarities in hip, knee, and torso angles (Shinohara & Maeda, 2015). This similarity allows the athlete to properly initiate the sprint and execute an effective first step, which would be the initial lesson in developing sprint ability (Čoh, Tomažin, & Štuhec, 2006). ...

... Moreover, Payne & Blader [4] have reported on the forces applied to the blocks as the sprinters leave the starting blocks, and Shinohara & Maeda [5] have reported on the relation between the forces applied to the blocks and the ground reaction force of the first step. However, there have been few studies that investigate in detail the relation of arrangement of the starting blocks with both the forces applied to the blocks and the ground reaction force of the first step [6] [7]. ...

... Furthermore, superior sprinters can quickly apply this force, allowing them to leave the starting block faster (Willwacher et al., 2013). In addition to the athlete's capability, the start block settings (e.g., distance between the blocks, distance between the starting line and front block, and slope) can also affect the start performance (Shinohara & Maeda, 2011). Thus, measuring the performance of athletes when exiting the start phase is essential for evaluating the performance of sprinters. ...

... Frequently, for calculating and obtaining the muscle strength and muscle activity, a physical model of the bones, tendons, and muscles of the human body is used to estimate the muscle strength (muscle activity) to solve the equation of the motion [3]- [8]. However, even using sophisticated computer technology or complicated physical models, biological limitations still remain. ...